GracefulDeath\Builder::catchSignals PHP Method

    public function catchSignals($signals)
    {
        if (!is_array($signals)) {
            $signals = [$signals];
        }
        $signals = array_filter($signals, function ($signal) {
            return is_integer($signal);
        });
        $this->options['catchSignals'] = $signals;
        return $this;
    }